The Silver Bullet (Unabridged)

Dr. Jim Herrick and his friend Robin are on a walking tour in the English countryside when they come across a large house where all the lights in the house are on and all of the doors are open. While trying to find someone at home, they discover the body of Colonel Carr, dead from a gunshot wound. After reporting their discovery to the authorities, Dr. Jim decides he would investigate the murder. Suspects abound as the Colonel was an intensely disliked person.
A classic "who done it" written by a well respected British mystery writer will hold the attention of a listener throughout the tale.